Patent US2814253A successfully refreshed from Google Patents.
US2814253A
Expired / Lapsed
US
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Pumping equipment for viscous liquids
Assignee: Individual
•
Filing: 1955-03-29
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Granted: 1957-11-26
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Expires: 1975-03-29
Abstract
No abstract record available.
Inventors
- 👤 Friedrich W Pleuger
- 👤 Grober Johann Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:17
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/109; F04B43/00; F04B43/08; F04B43/10; F04B43/107; F04B47/00; F04B47/06; F04B9/00; F04B9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |